Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6530440 | Percussive drilling apparatus | Kenneth Larsson | 2003-03-11 |
| 6164392 | Percussive drilling apparatus | Kenneth Larsson | 2000-12-26 |
| 4557609 | Rotary drill bit | — | 1985-12-10 |
| 4427307 | Rotary drill bit | Lars G. Norlander, Erik T. Brask | 1984-01-24 |